hexagon: SMP: Remove call to ipi_call_lock()/ipi_call_unlock()
authorYong Zhang <yong.zhang0@gmail.com>
Tue, 29 May 2012 07:15:56 +0000 (15:15 +0800)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 5 Jun 2012 15:27:11 +0000 (17:27 +0200)
commit4ee0444bebf3d0399c93841d98826ade193e6330
tree5bbff111a71b2fbbf165b3ce480bdb885d14d898
parent99becf1328d8d71dd6f4480e3591d7dcdb389e57
hexagon: SMP: Remove call to ipi_call_lock()/ipi_call_unlock()

ipi_call_lock/unlock() lock resp. unlock call_function.lock. This lock
protects only the call_function data structure itself, but it's
completely unrelated to cpu_online_mask. The mask to which the IPIs
are sent is calculated before call_function.lock is taken in
smp_call_function_many(), so the locking around set_cpu_online() is
pointless and can be removed.

[ tglx: Massaged changelog ]

Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Cc: ralf@linux-mips.org
Cc: sshtylyov@mvista.com
Cc: david.daney@cavium.com
Cc: nikunj@linux.vnet.ibm.com
Cc: paulmck@linux.vnet.ibm.com
Cc: axboe@kernel.dk
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: linux-hexagon@vger.kernel.org
Link: http://lkml.kernel.org/r/1338275765-3217-2-git-send-email-yong.zhang0@gmail.com
Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/hexagon/kernel/smp.c